﻿using System;

public class MyMath
{
    public static double Add(double a, double b)
    {
        return a + b;
    }

    public static double Subtract(double a, double b)
    {
        return a - b;
    }

    public static double Multiply(double a, double b)
    {
        return a * b;
    }

    public static double Divide(double a, double b)
    {
        return a / b;
    }
}

class Program
{
    static void Main(string[] args)
    {
        double sum = MyMath.Add(5, 3);
        Console.WriteLine($"5 + 3 = {sum}");
        double difference = MyMath.Subtract(10, 4);
        Console.WriteLine($"10 - 4 = {difference}");
        double product = MyMath.Multiply(6, 7);
        Console.WriteLine($"6 * 7 = {product}");
        double quotient = MyMath.Divide(20, 5);
        Console.WriteLine($"20 / 5 = {quotient}");




    }
}